<!DOCTYPE html>
<html>
    <body>

        <script>
            person = new Object();
            person.firstname = "Bill";
            person.lastname = "Gates";
            person.age = 56;
            person.eyecolor = "blue";
            document.write(person.firstname + " is " + person.age + " years old.");
        </script>

    </body>
</html>